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General trends, new issues, new policies etc. Start a new thread on your question. Please do not discuss ebay in THIS forum as we have a separate and popular Forum for that discussion. We all know that stamps from sheets have little crinkly edges where the sheets were perforated, and get very agitated counting the number of little holes or is it the number of teeth? Should we still refer to them as " Perfs"? Re: How shall we describe these "Perforated" edges? Die Cut Simulated Perf.
Although with some countries it would just be DC for Die Cut as there are no "holes" and bascially just a modern "roulette". To me the printing quality is good compared to some rather poor efforts in recent times, the backing sheet perforations make "collecting" easier and they still look like a stamp should in my book. Perhaps a collector was involved at a senior level in their development somewhere.
Post by tonymacg » Thu Dec 19, pm They are roulettes. Post by makielb » Thu Dec 19, pm tonymacg wrote: They are roulettes. Mike Why do we need perforations? Scissors are cheap! Post by dukeprince » Thu Dec 19, pm makielb wrote: tonymacg wrote: They are roulettes. Never missing teeth with these sticker stamps! I call these perfs "teeth", just like how we call them in Dutch. Post by aethelwulf » Thu Dec 19, pm They're die cuts to me.
Perforations should be the teeth resulting from punching holes, diecuts are the result of a fine blade cutting around a sticker-stamp. Post by Allanswood » Thu Dec 19, pm Well casualy looking in the catalogue will usually give an answer! The ACSC calls them "die cut simulated perf. This means each individual stamp is separated from the surrounding stamps by a clean cut, but all the stamps are together on one backing paper, which may not be separated at all.
It is more common, however, even in the case of die-cutting, for some form of perforation or separation to be used on the backing paper, too, so customers can separate the stamps without removing them from the backing. Interestingly, the pattern of perforation on the edge of stamps is so popular that even some self-adhesive stamps have a perforation pattern created on their edges, even if they are not perforated. This is done specifically for aesthetic purposes.
True perforation involves cutting lots of small holes along the sides of a stamp. When a customer pulls at two stamps, the paper gives at these perforated edges, creating a clean separation.
As the shape of the wheel points are not straight lines the cuts will correspond to their shape, and this gives rise to a variety of roulettes known generally by their French names.
One of the most famous type of rouletting is serpentine. The second chief method of stamp separation is perforation. This is the most widely used method that is employed by all countries. By this process the paper between the stamps is cut away in a line of holes, leaving some untouched spaces that hold the stamps together. When the time comes the items are easily separated without being damaged. The untouched paper between the stamps are called the teeth of the perforation, and of course project from the stamp when it is torn from the sheet.
The width of the teeth and the diameter of the holes between are usually equal. Die-cutting is a method of stamp separation that is mostly used to separate self-adhesive stamps. Modern self-adhesive stamps are very rarely perforated, instead they are die-cut. In other words, a special machine die cuts out the sides of the stamps.
As self-adhesive stamps are usually released in a coil form, the metal die cuts through the stamp paper and leaves the backing paper intact, providing the collectors with an opportunity to leave the unused stamps in their coil. Sometimes die-cut stamps are cut to simulate the look of traditional perforations; this is called a «serpentine» die-cut. And sometimes such stamps can be cut into fancy shapes adding a special flavor to a philatelic item.
As the size of the perforation often gives us a hint to the date when the stamps was released, it is necessary to measure them and describe them by a gauge number. Usually there are 12 or 13 perforations that can be counted in the space of two centimeters. This space is considered by collectors as the length in which perforations shall be measured, and the number of perforations in two centimeters is called the gauge of that perforation.
Thus a stamp perforated 12 would have perforations that take a span of two centimeters. The current United States stamps are perforated 12, and give a great material for testing the above rule.
The surest way to measure perforations is to paste a black band on a white card exactly two centimeters wide and lay the stamp on it so that the center of a tooth coincides with the edge of the black band; then you need to count the number of perforations to the other edge of the band.
There are many other unusual perforation varieties known as freaks that usually are less valuable than more scarce perforation errors but not always. Perforation shifts may result in perforations running through part of the stamp design, creating a stamp that is substantially off-center. If the shift changes the design of the stamp in some interesting way by placing a bottom inscription along the top of the stamp, for instance , collector interest in the freak is usually more ardent.
Stamps perforated while stamp paper is partially folded may wind up with wildly angled perforations on part of the sheet. These so-called crazy perfs often cut diagonally through a postage stamp with both the horizontal and vertical perforations. Stamp separation obviously extends far beyond the basic perforation into many other areas. Additional information can be found in the Scott stamp catalogs and in Cabeen's Standard Handbook of Stamp Collecting.
Fundamentals of Philately by L. Williams provides extensive detail about the varieties of stamp separations around the world. World Stamps. US Stamps. Figure 2. Rouletting is another form of stamp separation. The coil pair at left has roulette slits, not perforations. Figure 1.
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